Finding Coordinates of a Slope

May 2010
26
1
A lines passes through the point (1,-3). State the coordinates of one other point on the line so that the slope of the lines is:

a. 4
b. undefined
c. (3/4)

Please help. What's the formula to solve this? Thanks.
 

masters

MHF Helper
Jan 2008
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Big Stone Gap, Virginia
A lines passes through the point (1,-3). State the coordinates of one other point on the line so that the slope of the lines is:

a. 4
b. undefined
c. (3/4)

Please help. What's the formula to solve this? Thanks.
Hi larry21,

[a] slope = 4, points (1, -3) and (x, y)

\(\displaystyle \frac{y_2-y_1}{x_2-x_1}=4\)

\(\displaystyle \frac{y- ^-3}{x-1}=\frac{4}{1}\)

\(\displaystyle y+3=4 \:\: and \:\: x-1=1\)

\(\displaystyle y=1 \:\:and\:\:x=2\)

\(\displaystyle (2, 1)\)

Do you think you could follow these steps and complete
the others?
 
May 2010
26
1
If the slope is "undefined" how would I solve it?

Edit: Never mind, figured it out.